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COORDINATES AS DETERMINED BY SIDE-SCAN SONAR - THEORY AND APPLICATIONS

A central issue in minehunting is the accuracy with which the coordinates of a mine-like object can be determined. This survey process is done in stages, first locating the ship and then locating the object with respect to the sonar. If side-scan is used, there is the additional stage of determining the vector between the ship and the towfish. The equations which determine the chart coordinates of a bottom object from the 14 variables which describe the side-scan sonar deployment which imaged that object are derived and presented. The improvements in the accuracy of the coordinates which could be achieved by improving the accuracy with which any variable is measured are then predicted. Coordinate data acquired during MINEX 87 is used to calculate the unmeasured angular variables which characterized that deployment.

Report Number

DREP-TM-88-2 — Technical Memorandum

Date of publication

15 Feb 1988

Number of Pages

37

DSTKIM No

88-02199

CANDIS No

55429

Format(s):

Microfiche filmed at DSIS;Originator's fiche received by DSIS;Hardcopy